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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 30-38 hours after estrus cycle begins






2. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






3. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






4. Microscopic - make sure not sterile - very few bulls are actually tested






5. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






6. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






7. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






8. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






9. Sperm is produced here






10. (male) pushes the testes outward toward the legs for a cool-down off of the body






11. Front feet and head first. (except for hogs and dogs)






12. Milk ~305 days - dry 60 days prior to calving






13. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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14. Look for infection - split - and rupture of the penis






15. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






16. Produce testosterone. located between the seminiferous tubules






17. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






18. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






19. 26 hours after estrus begins






20. Check feet and legs - look for masculine traits in build such as crest and muscling






21. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






22. Parturition is controlled by...






23. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






24. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






25. 19-23 (21) days






26. Days which have increasing daylight hours

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27. ~305 days (altough often longer due to breeding difficulties)






28. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






29. 147 days






30. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






31. Help to signal hormone levels which we need both in the brain right next to each other.






32. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






33. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






34. Parturition is controlled by...






35. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






36. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






37. Important 'landmark' during palpation






38. 45-60 days after breeding; re-breed as required






39. (switzerland) 2nd in size and milk production - most muscle -






40. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






41. Way to know everything is alright with the breeding male






42. Start of the reproductive tract for the female. located outside of the body






43. Actual heat cycle (period)






44. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






45. (LH) causes female's egg to break (her period)






46. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






47. 10-37 (21) days






48. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






49. Larger the cow - more milk is produced; smaller the cow - less milk is produced






50. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation